femtokatal

F4E1M3T1O1K5A1T1A1L1

noun

An SI unit of catalytic activity equal to 10⁻¹⁵ katals. Symbol: f

OriginEnglish katal ← Danish femten ← Old Norse fimmtán →
Scrabble 19
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

nounfemtokatal (plural femtokatals)

plural femtokatals

  1. metrologyAn SI unit of catalytic activity equal to 10⁻¹⁵ katals. Symbol: f

Origin

  1. Proto-Indo-European*pénkʷe
  2. Proto-Germanic*fimf
  3. Proto-Indo-European*déḱm̥
  4. Proto-Germanic*tehun
  5. Proto-Germanic*fimftehun
  6. Old Norsefimmtán
  7. Danishfemten
  8. Englishfemto-
  9. Englishkatal
  10. Englishfemtokatal

From femto- + katal.

Full word history & related roots →
Cite this entry
APA

femtokatal. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/femtokatal

MLA

“femtokatal.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/femtokatal. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “femtokatal,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/femtokatal.

Source: femtokatal on Wiktionary, CC BY-SA 4.0.